diff --git a/pkgs/development/python-modules/trl/default.nix b/pkgs/development/python-modules/trl/default.nix
index bc89ac18fd4b..e2b0b144b4c1 100644
--- a/pkgs/development/python-modules/trl/default.nix
+++ b/pkgs/development/python-modules/trl/default.nix
@@ -16,14 +16,14 @@
 
 buildPythonPackage rec {
   pname = "trl";
-  version = "0.20.0";
+  version = "0.21.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "huggingface";
     repo = "trl";
     tag = "v${version}";
-    hash = "sha256-z14refdNySnKcfFq54l+slsi4SLe5FG8UNoAKxfmAy0=";
+    hash = "sha256-9jbbbiGa/2NqHKe9rxDRyzfaWyy7tsoeHaMlpg0Oxk0=";
   };
 
   build-system = [